mirror of
https://github.com/matrix-org/dendrite
synced 2024-11-19 08:10:57 +01:00
a2174d3294
* Implement /keys/changes And refactor QueryKeyChanges to accept a `to` offset. * Unbreak tests * Sort keys when serialising log tokens
102 lines
3.4 KiB
Go
102 lines
3.4 KiB
Go
// Copyright 2020 The Matrix.org Foundation C.I.C.
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
package postgres
|
|
|
|
import (
|
|
"context"
|
|
"database/sql"
|
|
"math"
|
|
|
|
"github.com/Shopify/sarama"
|
|
"github.com/matrix-org/dendrite/internal"
|
|
"github.com/matrix-org/dendrite/keyserver/storage/tables"
|
|
)
|
|
|
|
var keyChangesSchema = `
|
|
-- Stores key change information about users. Used to determine when to send updated device lists to clients.
|
|
CREATE TABLE IF NOT EXISTS keyserver_key_changes (
|
|
partition BIGINT NOT NULL,
|
|
log_offset BIGINT NOT NULL,
|
|
user_id TEXT NOT NULL,
|
|
CONSTRAINT keyserver_key_changes_unique UNIQUE (partition, log_offset)
|
|
);
|
|
`
|
|
|
|
// Replace based on partition|offset - we should never insert duplicates unless the kafka logs are wiped.
|
|
// Rather than falling over, just overwrite (though this will mean clients with an existing sync token will
|
|
// miss out on updates). TODO: Ideally we would detect when kafka logs are purged then purge this table too.
|
|
const upsertKeyChangeSQL = "" +
|
|
"INSERT INTO keyserver_key_changes (partition, log_offset, user_id)" +
|
|
" VALUES ($1, $2, $3)" +
|
|
" ON CONFLICT ON CONSTRAINT keyserver_key_changes_unique" +
|
|
" DO UPDATE SET user_id = $3"
|
|
|
|
// select the highest offset for each user in the range. The grouping by user gives distinct entries and then we just
|
|
// take the max offset value as the latest offset.
|
|
const selectKeyChangesSQL = "" +
|
|
"SELECT user_id, MAX(log_offset) FROM keyserver_key_changes WHERE partition = $1 AND log_offset > $2 AND log_offset <= $3 GROUP BY user_id"
|
|
|
|
type keyChangesStatements struct {
|
|
db *sql.DB
|
|
upsertKeyChangeStmt *sql.Stmt
|
|
selectKeyChangesStmt *sql.Stmt
|
|
}
|
|
|
|
func NewPostgresKeyChangesTable(db *sql.DB) (tables.KeyChanges, error) {
|
|
s := &keyChangesStatements{
|
|
db: db,
|
|
}
|
|
_, err := db.Exec(keyChangesSchema)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
if s.upsertKeyChangeStmt, err = db.Prepare(upsertKeyChangeSQL); err != nil {
|
|
return nil, err
|
|
}
|
|
if s.selectKeyChangesStmt, err = db.Prepare(selectKeyChangesSQL); err != nil {
|
|
return nil, err
|
|
}
|
|
return s, nil
|
|
}
|
|
|
|
func (s *keyChangesStatements) InsertKeyChange(ctx context.Context, partition int32, offset int64, userID string) error {
|
|
_, err := s.upsertKeyChangeStmt.ExecContext(ctx, partition, offset, userID)
|
|
return err
|
|
}
|
|
|
|
func (s *keyChangesStatements) SelectKeyChanges(
|
|
ctx context.Context, partition int32, fromOffset, toOffset int64,
|
|
) (userIDs []string, latestOffset int64, err error) {
|
|
if toOffset == sarama.OffsetNewest {
|
|
toOffset = math.MaxInt64
|
|
}
|
|
rows, err := s.selectKeyChangesStmt.QueryContext(ctx, partition, fromOffset, toOffset)
|
|
if err != nil {
|
|
return nil, 0, err
|
|
}
|
|
defer internal.CloseAndLogIfError(ctx, rows, "selectKeyChangesStmt: rows.close() failed")
|
|
for rows.Next() {
|
|
var userID string
|
|
var offset int64
|
|
if err := rows.Scan(&userID, &offset); err != nil {
|
|
return nil, 0, err
|
|
}
|
|
if offset > latestOffset {
|
|
latestOffset = offset
|
|
}
|
|
userIDs = append(userIDs, userID)
|
|
}
|
|
return
|
|
}
|